Once you add the tool, there's a 'Connect Now' button (or a similarly named button). Press that and a tutorial photo shows up. Do what the photo says and a pairing request confirmation box will show up (at least on iPhone) and you confirm pairing.
I don't have the CT-36, but for the CTC-SYS, you press and hold the BT button until it goes solid then a couple seconds later the pairing request comes in.